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OpenStudy (anonymous):
Simplify the expression: sin 2a/cos a
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OpenStudy (anonymous):
(2(sin a) (cos a))/(cos a) = 2 * sin a
OpenStudy (anonymous):
*Double angle formula if you look in your book or notes, is what was just used in case you want to use it again:)
OpenStudy (anonymous):
KK. Thanks!
OpenStudy (anonymous):
Use algebra to prove the identity: sin t/1-cos t = 1+cos t/ sin t
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